A frame structure consisting of a shell beam and a steel tube concrete column

Abstract

The present invention proposes a novel frame structure composed of a shell beam and a steel tube concrete column, comprising a plurality of shell beams, a plurality of steel columns and a plurality of steel secondary beams; the plurality of steel columns are arranged in parallel, a shell beam is connected between two adjacent steel columns to form a frame system, and a plurality of steel secondary beams are arranged between two opposite shell beams at equal intervals; the shell beam is connected to the steel column through a connecting piece, and the connecting piece comprises an upper ring plate, a lower ring plate and a double web plate at the column end; an upper ring plate and a lower ring plate are arranged on the outer periphery of the steel column; the double web plate at the column end is arranged between the upper ring plate and the lower ring plate; the end of the upper flange of the shell beam is connected to the upper ring plate through a butt weld, and the end of the lower flange of the shell beam is connected to the lower ring plate through a butt weld; the ends of the corrugated webs on both sides of the shell beam are flat webs at the beam ends, and the flat webs at the beam ends on both sides are respectively connected to the double webs at the column ends through a plurality of high-strength bolts; so as to propose a novel frame structure composed of a shell beam and a steel tube concrete column with a strong force-bearing structure and material saving.

Description

Technical Field

[0001] The invention relates to the technical field of construction and civil engineering, and in particular to a frame structure consisting of a shell beam and a steel tube concrete column. Background Art

[0002] Traditional cast-in-place concrete cannot meet the requirements of new industry regulations; traditional all-steel structures are too expensive and have poor sound insulation, which is difficult for construction units to accept; the new PC structure also has difficult node processing, various supports still need to be set up during construction, and the durability of structural adhesives needs to be tested over time; the new shell beam-shell column frame has poor aesthetics, which is also difficult for construction units to accept. Summary of the invention

[0003] The purpose of the present invention is to provide a frame structure composed of shell beams and steel tube concrete columns, which has a strong force-bearing structure, saves materials, can be standardized, and is easy to mass produce.

[0004] To achieve the above object, the present invention proposes a novel frame structure composed of a shell beam and a steel tube concrete column, characterized in that it comprises a plurality of shell beams, a plurality of steel columns and a plurality of steel secondary beams;

[0005] A plurality of the steel columns are arranged in parallel, and a shell beam is connected between two adjacent steel columns to form a frame system, and a plurality of the steel secondary beams are arranged at equal intervals between two opposite shell beams;

[0006] The carapace beam is connected to the steel column through a connecting piece, and the connecting piece includes an upper ring plate, a lower ring plate and a double web plate at the column end;

[0007] The outer periphery of the steel column is provided with the upper ring plate and the lower ring plate; the column end double web plate is provided between the upper ring plate and the lower ring plate;

[0008] The end of the upper flange of the shell beam is connected to the upper ring plate by a butt weld, and the end of the lower flange of the shell beam is connected to the lower ring plate by a butt weld; the ends of the corrugated webs on both sides of the shell beam are flat webs at the beam ends, and the flat webs at the beam ends on both sides are respectively connected to the double webs at the column ends by multiple high-strength bolts.

[0009] Furthermore, it also includes steel bars; the steel bars are laid on the upper ring plate and the upper flange surface of the shell beam along the length direction of the shell beam, and the steel bars are welded and fixed to the upper ring plate through a trumpet-shaped weld.

[0010] Furthermore, the double webs at the column ends and the flat webs at the beam ends transmit all the shear force of the shell beam via high-strength bolts.

[0011] Furthermore, the upper flange of the carapace beam, the lower flange of the carapace beam, the upper ring plate, the lower ring plate and the steel bars bear all the bending moments of the carapace beam.

[0012] Furthermore, concrete is poured in both the shell beam and the steel column, and the double webs at the column ends form a hoop constraint on the concrete inside the shell beam.

[0013] Furthermore, the upper flange of the carapace beam is composed of two flat-web steel plates, and a gap is reserved between the two flat-web steel plates to facilitate pouring of concrete.

[0014] Furthermore, the steel column is an H-shaped steel column, a box-shaped steel column, a circular steel column, a rectangular steel tube concrete column or a circular steel tube concrete column.

[0015] Furthermore, a steel mesh is laid on the surface of the steel secondary beam, and a reinforced concrete floor deck is formed after concrete is poured.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] 1. The connection structure between the carapace beam and various steel columns of the present invention is suitable for various steel columns. The web of the carapace beam is a corrugated web with a folding effect. The corrugations only have shear force, and the high-strength bolts at the nodes only need to transmit shear force; the upper and lower flanges and the steel bars must and can only transmit all bending moments. The division of labor of each plate is clear, the force is single, the node calculation and structure are simple, and the construction is convenient.

[0018] 2. The double web at the column end has a restraining effect. Concrete can be poured inside and steel bars can be added at the nodes. By adjusting the number of steel bars, the types of shell beams can be reduced, the components of shell beams can be standardized, and production can be simplified.

[0019] 3. Strong economy. Due to the connection structure, the force division of the system is clear, so that the corrugated web does not need to bear the bending moment, resulting in a reduction in the number of high-strength bolts compared to the traditional steel beam-steel column frame structure. Compared with the traditional steel beam-steel column frame structure with the same bearing capacity, the overall cost can be saved by 10~25%.

[0020] 4. The steel bars and the upper flange of the shell beam are welded to the upper ring plate, ensuring the continuity of the tensile flow at the node; the lower flange of the shell beam is welded to the lower ring plate, and the pressure flow is continuous at the node; concrete is poured into the double web of the column end, and the pressure flow of the concrete is continuous at the node, and the tensile and pressure flow

[0021] The continuity of the beam forms a force couple, which ensures the reliable bending bearing capacity of the node. The flat web at the beam end transmits the shear force at the beam end to the column through high-strength bolts and the double web at the column end, which is safe and reliable.

[0022] 5. After the frame is poured with concrete, the structure heats up slowly and has better fire resistance and corrosion resistance; the presence of concrete reduces the sound transmission ability and can provide a better sound environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an overall structural diagram of a new frame structure composed of a shell beam and steel tube concrete columns in the present invention.

[0024] Figure 2 It is a three-dimensional diagram of the connection structure between the carapace beam and various steel columns in an embodiment of the present invention;

[0025] Figure 3 An exploded view of the connection structure between the carapace beam and various steel columns in an embodiment of the present invention;

[0026] Figure 4 This is a three-dimensional diagram of the carapace beam and various steel columns after concrete is poured inside in an embodiment of the present invention;

[0027] Figure 5 This is a structural diagram of the influence of the beam-column line on the column end toy in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described below.

[0029] like Figure 1 As shown, the present invention proposes a frame structure composed of a shell beam and a steel tube concrete column, including a plurality of shell beams 1, a plurality of steel columns 2 and a plurality of steel secondary beams 9;

[0030] A plurality of steel columns 2 are arranged in parallel, and a carapace beam 1 is connected between two adjacent steel columns 2 to form a frame system, and a plurality of steel secondary beams 9 are arranged at equal intervals between two opposite carapace beams 1;

[0031] The carapace beam 1 is connected to the steel column 2 through a connecting piece, and the connecting piece includes an upper ring plate 3, a lower ring plate 4 and a double web plate 5 at the column end;

[0032] like Figure 2 and Figure 3 As shown, the present invention proposes a connection structure between a carapace beam and various steel columns 2, including a carapace beam 1, a steel column 2, an upper ring plate 3, a lower ring plate 4 and a column end double web 5;

[0033] The outer periphery of the steel column 2 is provided with an upper ring plate 3 and a lower ring plate 4; the column end double web plate 5 is provided between the upper ring plate 3 and the lower ring plate 4;

[0034] The end of the upper flange 6 of the carapace beam is connected to the upper ring plate 3 through a butt weld, and the end of the lower flange 7 of the carapace beam is connected to the lower ring plate 4 through a butt weld; the ends of the corrugated webs 9 on both sides of the carapace beam 1 are flat webs 10 at the beam ends, and the flat webs 10 at the beam ends on both sides are respectively fastened to the double webs 5 at the column ends through multiple high-strength bolts, and the column end double webs 5 and the flat webs 10 at the beam ends transmit all the shear force of the carapace beam 1 to the steel column 2 through high-strength bolts, so that the overall structure is safe and reliable.

[0035] In this embodiment, steel bars 8 are also included; the steel bars 8 are laid on the upper ring plate 3 and the upper flange 6 of the shell beam along the length direction of the shell beam 1, and the steel bars 8 are welded and fixed to the upper ring plate 3 through a trumpet-shaped weld. The upper flange of the shell beam, the lower flange of the shell beam, the upper ring plate 3, the lower ring plate 4 and the steel bars 8 bear all the bending moments of the shell beam. By adjusting the number of steel bars 8, the types of shell beams 1 can be reduced, the components of the shell beam 1 can be standardized, and the production can be simplified.

[0036] like Figure 4 As shown, concrete is poured in the shell beam 1 and the steel column 2, and the double web plate 5 at the column end forms a hoop constraint on the concrete inside the shell beam 1. The upper flange of the shell beam is two flat web steel plates, and a gap is reserved between the two flat web steel plates for pouring concrete.

[0037] The upper flange 6 of the carapace beam, the steel bar 8, and the lower flange 7 of the carapace beam form a combined section. At the connection node with the steel column 2, the steel bar 8 and the upper flange 6 of the carapace beam are welded to the surface of the upper ring plate 3, ensuring the continuity of the tension flow at the node; the lower flange 7 of the carapace beam is welded to the lower ring plate 4, and the pressure flow is continuous at the node; concrete is poured in the double web, and the pressure flow of the concrete is continuous at the node. The continuity of the tension and pressure flow forms a force couple, ensuring the reliable bending bearing capacity of the node.

[0038] The shape of the steel column 2 is not limited, and it can be an H-shaped steel column 2, a box-shaped steel column 2, a circular steel column 2, a rectangular steel tube concrete column or a circular steel tube concrete column. In this embodiment, it is a circular steel tube concrete column.

[0039] In this embodiment, a steel mesh is laid on the surface of the steel secondary beam 9, and a reinforced concrete floor slab is formed after concrete is poured. After the frame is poured with concrete, the structure heats up slowly and has better fire resistance and corrosion resistance. The presence of concrete reduces the sound transmission ability and can provide a better sound environment.

[0040] In terms of economy, in the present invention, the upper ring plate 3 extends out of the cross section of the steel column 2, and after the upper flange 6 of the shell beam is connected in the above-mentioned manner, the shell beam 1 steel bar 8 can also be welded on the extended upper ring plate 3. After the concrete is poured in the beam, the node forms a composite structure of a steel shell and steel bars 8 and concrete inside. The steel bar 8 concrete beam inside can be constructed without formwork and scaffolding, and can share a large proportion of the load (varies according to the reinforcement conditions). Figure 5 As shown, calculations show that if the cost of the inner steel bar 8 concrete and the cost of the outer steel beam shell each account for 50%, then the inner steel bar 8 concrete beam can bear 70% of the node negative bending moment. Since the corrugated web 9 does not bear bending moment, the number of high-strength bolts is only 25~40% of the traditional steel beam-steel column 2 frame structure, which means that this approach has very good economy. Compared with the traditional steel beam-steel column 2 frame structure with the same bearing capacity, this node can save about 30~40% of the cost. Using this frame composed of the shell beam 1 and the steel column 2, and using this new connection method, the overall cost can be saved by 10~20% compared with the traditional steel beam-steel column 2 frame structure under the same conditions.

[0041] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

[0042] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A frame structure consisting of a shell beam and a steel tube concrete column, characterized in that: including a plurality of carapace beams, a plurality of steel columns and a plurality of steel secondary beams; A plurality of the steel columns are arranged in parallel, and a shell beam is connected between two adjacent steel columns to form a frame system, and a plurality of the steel secondary beams are arranged at equal intervals between two opposite shell beams; The carapace beam is connected to the steel column through a connecting piece, and the connecting piece includes an upper ring plate, a lower ring plate and a double web plate at the column end; The outer periphery of the steel column is provided with the upper ring plate and the lower ring plate; the column end double web plate is provided between the upper ring plate and the lower ring plate; The end of the upper flange of the shell beam is connected to the upper ring plate by a butt weld, and the end of the lower flange of the shell beam is connected to the lower ring plate by a butt weld; the ends of the corrugated webs on both sides of the shell beam are beam end flat webs, and the beam end flat webs on both sides are respectively connected to the column end double webs by multiple high-strength bolts; It also includes steel bars; the steel bars are laid on the upper ring plate and the upper flange surface of the shell beam along the length direction of the shell beam, and the steel bars are welded and fixed to the upper ring plate through a trumpet-shaped weld; The double webs at the column ends and the flat webs at the beam ends transmit all the shear force of the shell beam through high-strength bolts; The upper flange of the shell beam, the lower flange of the shell beam, the upper ring plate, the lower ring plate and the steel bars bear all the bending moments of the shell beam; Concrete is poured inside the shell beam and the steel column, and the double webs at the column ends form a hoop constraint on the concrete inside the shell beam; The upper flange of the shell beam is two flat steel plates, and a gap is reserved between the two flat steel plates to facilitate pouring of concrete; The steel column is an H-shaped steel column, a box-shaped steel column, a circular steel column, a rectangular steel tube concrete column or a circular steel tube concrete column; A steel mesh is laid on the surface of the steel secondary beam, and a reinforced concrete floor deck is formed after concrete is poured.

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